Sometimes I'm using my phone, and I stop and say to myself "holy shat on a hot tin roof, there's a terminal on my phone!" The novelty amuses me, but short of using apt, vim, MC, and the occasional game of unnethack, I rarely use it.

Still though—there's a terminal on my phone. That's so neat.

I've only bricked my n900 once, so obviously I need to start using the command prompt more. What awesome or useful things (preferably both, but awesome and useless is acceptable) can the terminal be used for on the n900? Can I place phone calls with a command? Are there some CLI programs that are simply useful or do something that isn't replicated easily in the GUI?